Design optimization of an aerated hopper for discharge of cohesive pulverized coal

Lu, Haifeng; Cao, Jiakun; Guo, Xiaolei; Gong, Xinglong; Fu, Lin

doi:10.1016/j.powtec.2019.08.103

Cited by 6 publications

(1 citation statement)

References 15 publications

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“…They are installed on tank walls. Air pressure is applied directly on the material by means of silicone edges adjoining the feeder inner walls [47]. Aeration of material prevents it from hanging up inside and facilitates the flow in the compaction zone [48].…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Use of Polymer Lining within the Roller Press Gravity Feeder on Briquette Quality

Bembenek

2020

Polymers

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When considering the operation of roller presses for the consolidation of fine-grained materials, the main problems are disturbances in the proper flow of the material and its bridging in gravity feeders. This is especially true for small and medium capacity presses, where the hoppers for dosing the material are narrow. This article presents innovative laboratory tests of the impact of using a polymer plate lining in the gravity feeder of a roller press. Polymer materials Polyacetal C (POM C) and Ultra-High-Molecular-Weight Polyethylene (UHMW-PE) were used for the tests. The influence of the use of plates on the material flow and quality of briquettes was investigated in comparison with the case where such plates were not used. The research showed an improvement in the flow of fine-grained materials in the feeder and an increase of the briquette strength indexes, as compared to those cases when polymer linings were not used in the feeder.

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Section: Introductionmentioning

confidence: 99%

The Influence of the Use of Polymer Lining within the Roller Press Gravity Feeder on Briquette Quality

Bembenek

2020

Polymers

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Triggering flow of jammed cohesive granular materials using modulated pulsed airflow

Zhu

Guo

et al. 2021

AIChE Journal

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Realizing the stable high-flux flow of cohesive granular materials is a complicated subject. We experimentally studied the dynamic characteristics of cohesive granular materials discharged from hopper under modulated pulsed airflow. Results show that pulsed airflow with a smaller duty cycle can effectively trigger the stable flow of jammed cohesive granular materials. Furthermore, under proper working conditions, the hopper flow will change from the classic arch breaking mode to a free flowing mode like liquid.The flow rate of the powder in the free flowing mode will decrease as powder bed height decreases, which overturns the consistent recognition. The oscillating shear provided by the pulsed airflow eliminates the Janssen effect and achieves a liquid-like stress transmission, which supports the above findings. Through energy analysis, we gave the scaling relationship between the pressure gradient and the pulse parameters to cover the experimental data and revealed the internal mechanism.

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Discharge characteristics of coal and extraction residue from direct coal liquefaction in partial fluidization silo

Liu

Zhang

2022

Chinese Journal of Chemical Engineering

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Design optimization of an aerated hopper for discharge of cohesive pulverized coal

Cited by 6 publications

References 15 publications

The Influence of the Use of Polymer Lining within the Roller Press Gravity Feeder on Briquette Quality

The Influence of the Use of Polymer Lining within the Roller Press Gravity Feeder on Briquette Quality

Triggering flow of jammed cohesive granular materials using modulated pulsed airflow

Discharge characteristics of coal and extraction residue from direct coal liquefaction in partial fluidization silo

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